Hairbrush



FIG. 1 is a perspective view of the hairbrush.

FIG. 2 is a front view of the hairbrush (the rear view being identical to the front view of the hair brush).

FIG. 3 is a left side view of the hairbrush (the right side view being identical to the left view of the hair brush).

FIG. 4 is a top end view of the hair brush of FIG. 1; and,

FIG. 5 is a bottom end view of the hair brush of FIG. 1. 

The ornamental design for a hairbrush, as shown and described. 